Trunk or furniture caster



(NovMoael.)

J. P. GARMIGHAEL.

TRUNK 0R FURNITURE GASTRR.

Patented Apr. 24, 1888.

NITED STATES PATENT OFFICE.

. JOHN P. OARMICHAEL, OF MILWAUKEE, WISCONSIN.

TRUNK OR FURNITURE CASTER.

SPECIFICATION forming part of Letters Patent No. 381,759, dated April24, 1889.

Application lecl July 23, 1885. Serial No.172,387. (No model.) -A V ToLZZ whom it may concern.-

Be it known that I, JOHN P. OARMIOHAEL, of Milwaukee, in the county ofMilwaukee,and in the State of Wisconsin, have invented certain new anduseful Improvements in Trunk or Furniture Casters; and I do herebydeclare that the following is a full, clear, and exact descriptionthereof.

My invention relates to trunk or furniture In the drawings, Figure lis-a vertical section through the center of my caster. Fig. 2 is a planview of the bottom plate. Fig. 3 is a perspective of the bottom plate,and Fig. 4. is aperspective view of the baseplate inverted.

A is the base-plate, which is ofinverted-cup shape, and B is the bottomplate. This latter is formed with a raised portion, b, having a hub, b',that terminates in a spindle, c, and alsohas bearinglugs c d e, whileother bearing-lngs,f

f', extend up from the base-plate adjacent to lugs d and e,respectively. The trunnions of each of the anti-friction wheels g g gare sup ported in notches in each pair oflugs, and these wheels aredesigned to receive the bottoni of the base-plate, while spindle oprojects up through said base-plate and is secured thereon by a suitablehead, as shown, for instance, in Fig. 1.

O is the main roller-wheel, which is designed for contact with thefloor, and the axis of this wheel is under a point about midway betweenthe center of the wheel gand the vertical center of spindle c, so thatthe weight carried by the caster will be evenly balanced between thespindle and this roller, while the rollers gwill prevent the spindlefrom cramping in the baseplate when the weight comes on the caster onthe opposite side ofthe spindle from the wheel g. Therefore there are nobinding-points in my caster, and cramping is impossible. By myconstruction the chief weight or pressure comes on the wheels g y',which are nested together about the pivotal point c, and hence the wheelg is largely relieved from said weight or pressure by moving in a circlewhich is outside of the line of rotation of the said wheels gg, andtherefore is enabled to eXert nearly its whole force j ust whereneeded-that is, adjacent to the roller O-and this also relieves the wearand tear on the bearing or pivotal point c.

My caster is especially useful with very heavy articles offurniture-such as pianos, heavy trunks, sideboards, and thelike-and alsovery useful for trucks. I have shown two wheels nested about the pivotalpoint, making three anti-friction wheels in all; but I may use more orless, keepingin mind that the wheel nearest the roller O is to move in aline outside of the line of mot-ion of the other wheel or wheels.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

In a caster, a bottom plate having a spindle, with an anti-frictionwheel or wheels sustained adjacent thereto, and another antifrictionwheel moving in a circle outside the line of motion of the first-namedwheel or wheels, in combination with a roller journaled beneath a pointbetween the lastnamed antifriction wheel and the spindle, substantiallyas set forth.

In testimony that I claim the foregoing I have hereunto set my hand, atMilwaukee, in thc county of Milwaukee and State of Wisconsin, in thepresence of two witnesses.

JOHN I?. OARMIOHAEL.

Witnesses:

H. G. UNDERwooD, G. A. PLATZ.

